Heck, we don’t even need to come up with scenarios like that, because she couldn’t even do everyday functions of the job.
Can she get down on one knee to tie a child’s shoe? Nope. Can she stoop down and pick up toys scattered on the floor so kids don’t trip on them? Nope. Can she take the kids for a walk to the park so they get their daily exercise? Nope.
She wouldn’t be a caretaker so much as a babysitter. She’d sit around and look at your baby.